<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>CSS 日历样式</title>
    <style>
        * {
            box-sizing: border-box;
        }

        ul {
            list-style-type: none;
        }

        body {
            font-family: Verdana, sans-serif;
        }

        .month {
            padding: 70px 25px;
            width: 100%;
            background: #1abc9c;
        }

        .month ul {
            margin: 0;
            padding: 0;
        }

        .month ul li {
            color: white;
            font-size: 20px;
            text-transform: uppercase;
            letter-spacing: 3px;
        }

        .month .prev {
            float: left;
            padding-top: 10px;
        }

        .month .next {
            float: right;
            padding-top: 10px;
        }

        .weekdays {
            margin: 0;
            padding: 10px 0;
            background-color: #ddd;
        }

        .weekdays li {
            display: inline-block;
            width: 13.6%;
            color: #666;
            text-align: center;
        }

        .days {
            padding: 10px 0;
            background: #eee;
            margin: 0;
        }

        .days li {
            list-style-type: none;
            display: inline-block;
            width: 13.6%;
            text-align: center;
            margin-bottom: 5px;
            font-size: 12px;
            color: #777;
        }

        .days li .active {
            padding: 5px;
            background: #1abc9c;
            color: white !important
        }

        /* Add media queries for smaller screens */
        @media screen and (max-width:720px) {

            .weekdays li,
            .days li {
                width: 13.1%;
            }
        }

        @media screen and (max-width: 420px) {

            .weekdays li,
            .days li {
                width: 12.5%;
            }

            .days li .active {
                padding: 2px;
            }
        }

        @media screen and (max-width: 290px) {

            .weekdays li,
            .days li {
                width: 12.2%;
            }
        }
    </style>

    <script>

    </script>
</head>

<body>

    <h1>CSS 日历</h1>

    <div class="month">
        <ul>
            <li class="prev">❮</li>
            <li class="next">❯</li>
            <li style="text-align:center">
                August<br>
                <span style="font-size:18px">2016</span>
            </li>
        </ul>
    </div>

    <ul class="weekdays">
        <li>Mo</li>
        <li>Tu</li>
        <li>We</li>
        <li>Th</li>
        <li>Fr</li>
        <li>Sa</li>
        <li>Su</li>
    </ul>

    <ul class="days">
        <li>1</li>
        <li>2</li>
        <li>3</li>
        <li>4</li>
        <li>5</li>
        <li>6</li>
        <li>7</li>
        <li>8</li>
        <li>9</li>
        <li><span class="active">10</span></li>
        <li>11</li>
        <li>12</li>
        <li>13</li>
        <li>14</li>
        <li>15</li>
        <li>16</li>
        <li>17</li>
        <li>18</li>
        <li>19</li>
        <li>20</li>
        <li>21</li>
        <li>22</li>
        <li>23</li>
        <li>24</li>
        <li>25</li>
        <li>26</li>
        <li>27</li>
        <li>28</li>
        <li>29</li>
        <li>30</li>
        <li>31</li>
    </ul>

</body>

</html>